Minute sand glass



Dec. 15, 1936. KOESTER 2,064,759

MINUTE SAND GLAS 5 Filed Jan. 10, 1935 [RM/v K0075? A TTORNEY Patented Dec. 15, 1936 UNITED STATES PATENT OFFICE Application January 10, 1935, Serial No. 1,242 In Germany January 10, 1934 1 Claim.

This invention relates to minute sand glasses of the type in which the two co-axial sand vessels which communicate with one another are so sus pended as to constitute a pendulum, and in which a bell is provided With which that pendulum cooperates at a certain point of time, viz. when the sand that has been contained in the upper vessel at the commencement of use of the implement has run down into the lower vessel whereupon the sand vessels are tilted over and said bell is actuated, the sound produced indicating the elapse of the period of time for which the implement has been designed or for which it had been adjusted.

While in the known constructional forms of implements of the above-stated type the clapper formed by the lower end of the holder contacts only one time with the bell, the present improved constructional form is so designed that the clapper contacts several times with the bell, thus calling the attention of the person concerned more effectively to the situation. I attain the object in View by designing the holder mentioned, and suspending it, in such a manner that it can swing freely on the pivot supporting it when the sand vessels have been tilted over when the predetermined period of time has elapsed, the clapper contacting now several times with the bell owing to the oscillations of said holder. 30 The invention is illustrated diagrammatically and by way of example on the accompanying drawing, on which Figure 1 is a. front-view of a minute sand glass designed according to this invention and shows the holder and the sand vessels in that position which these members assume at the end of use of the implement, that is to say, when the sand vessels have just tilted over and the pendulum formed by these members is oscillating, as indicated by the arrows. Figure 2 is a similar representation showing the holder with the sand vessels in the position which these members have at the commencement of use of the implement, or shortly thereafter, at least prior to that distribution of the sand at which the tilting over of the sand vessels takes place.

On the drawing, denotes a wall plate from which extends at the upper portion thereof a horizontal pin 0 to which the sand vessel holder 1) is attached and from which this holder is suspended when it is in the position shown in Fig. 1. In its other position (Fig. 2) the holder is held by a disk m which is eccentrically arranged on a pin 11. also projecting from the wall plate a. The pin n is located to the left of the pin c and on a higher level than this latter pin. The middle portion of the holder b is designed as a clamp I which embraces the reduced portion d of the united sand vessels d. These vessels communi cate with one another in known manner through said reduced portion (1.

The lower arm 1' of the holder b (below the clamp ,f) is resilient and the free end of this arm which is bent in the manner shown in the drawing is provided with a comparatively large aperture i in which is suspended an annular member e having likewise a comparatively large aperture 0, so that the parts e and 11 are freely movable with respect to one another. Below the abovedescribed parts, on the lowermost portion of the wall-plate, is located the bell g which is actuated by the annular member e that constitutes a clapper which engages the bell always tangentially which is useful for the intensity of the sounds produced by said members e and 9.

On the eccentrically supported abutment disk m are numerals 3, 4 and 5, each of which can co-operate with a mark r (Fig. 2) provided on the wall plate. It depends upon the position of the disk at whether the glass-vessels are to tilt after 3 or 4 or 5 minutes. It is obvious of course that other lengths of time may be chosen according to the work in connection with which the implement is used.

When the preliminarily aflixed period of time has elapsed during which either the entire amount of the sand or only a certain portion thereof has run down into the lower vessel, at any rate to such an extent that the lower vessel becomes heavier than the upper one and is, therefore, able to turn the combined members b and d on the pivot c, this turning or tilting over will take place. As a consequence, the annular member e will contact with the bell, and as the members b and d oscillate in a certain measure on the pin 0, the member or ring or clapper e will contact the bell repeatedly a corresponding number of times.

It is contemplated that instead of sand some other suitable material can be contained in the glass-vessels. Finally, I wish it to be understood that I do not limit myself to all details of the constructional form shown merely by way of example. In the details departures are possible which do not constitute departures from the invention.

I claim:

A minute sand glass, comprising, in combination, a wall plate, an oblong sand vessel which is contracted in its middle portion, a holder for said vessel and being coupled therewith at said contracted portion, a bell attached to said wall plate,

a resilient arm extending from said holder and provided at its free end with a clapper for acting on the said bell when the sand vessel is being tilted, a pin from which said holder and the said vessel are suspended and which serves as a fu1- crum for these members, an eccentrically supported disk bearing lndicia indicating periods of time and being so arranged with respect to said holder as to retain it in a predetermined angular position.

ERWIN KOES'IER. 

